Zavarzina G.A.

zavarzinag@mage.ru




Graduated from Saint Petersburg State Mining Institute, specialization «geology, prospecting and exploration of mineral deposits» (1994).
Senior Geologist of JSC «Marine Arctic Geological Expedition» (MAGE).
Area of scientific interest: regional and petroleum geology.
Author of 3 publications.
Offshore hydrocarbon deposits
Section editor – PhD in geology and mineralogy Margulis L.S.
Article # 64_2012 submitted on 10/15/2012 displayed on website on 12/06/2012
15 p.
pdf  Types of potential hydrocarbon traps and their areal extent in the western part of the Laptev sea shelf
Recent years have seen the discovery of over 50 local structures on the Laptev Sea shelf. Facies variations and intricate architecture of sedimentary sequences, their partition by displacements of complex kinematics determined the formation of different types of hydrocarbon traps. The evidence obtained from the seismic stratigraphic and seismic facial analysis as well as the structural mapping based on 2-D CDP reflection data has revealed the presence of structural, lithologic, lithologic/stratigraphic and combination hydrocarbon traps. The presented subdivision of hydrocarbon traps provides the basis for more efficient exploration during the early stages of studying exploration targets.

Key words: sedimentary basin, seismic sequence, displacement, strike-slip, normal fault, reverse fault, horst, graben, hydrocarbon trap, oil and gas play, oil and gas accumulation zone.
article citation Zavarzina G.А. Tipy potentsial'nykh lovushek uglevodorodov i ikh rasprostranenie v zapadnoy chasti shel'fa morya Laptevykh [Types of potential hydrocarbon traps and their areal extent in the western part of the Laptev sea shelf]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 4, available at: http://www.ngtp.ru/rub/5/64_2012.pdf
References

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   Gololobov Yu.N. Diagnosticheskoe znachenie paragenezisov diz"yunktivno-plikativnykh struktur [Diagnostic value of paragenesis of join-multiplicative structures]. Izvestiya VUZov, ser. Geologiya i razvedka, 1982, no. 12, p. 41-47.
   Thurston, Dennis K., Theis Leslie A. Geologic report for the Chukchi planning area, Alaska. Regional geology, petroleum geology and environmental geology. US Department of the Interior MMS, Alaska OSC Region. - Anchorage, Alaska. - 1987. - 193 p.
   Zony neftegazonakopleniya okrain kontinentov [Regional oil continental margins]. Editor Yu.N. Grigorenko, I.M. Mirchink. Moscow: OOO «Geoinformtsentr», 2002, p. 191-202.



Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
Article # 39_2012 submitted on 06/06/2012 displayed on website on 08/02/2012
14 p.
Tectonics of the western part of the Laptev sea shelf*
*The article is presented in two languages, Russian and English.

Main structural elements and disjunctive dislocation systems are revealed and traced from the results of integrated geophysical investigations (gravimetry, magnetometry and 2D seismic surveys) conducted in 2005 to 2010 within the Laptev Sea shelf. The breaks of the north-west strike identify the formation of the Laptev Sea Plate and its main structures: the Lena-Taimyr area of border uplifts, West-Laptevrift system and Novosibirsk system of grabens and horsts. The slips of the north-east strike dominate as transversal breaks of Cenozoic activation. Identification of the main disjunctive dislocation systems is the base for tectonic zonation and understanding of region evolution.

Key words: rifting, tectonic block, thrust, fault, slip, strike-slip, Laptev Sea Plate.
article citation Zavarzina G.А., Shkarubo S.I. Tektonika zapadnoy chasti shel'fa morya Laptevykh [Tectonics of the western part of the Laptev sea shelf]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 3, available at: http://www.ngtp.ru/rub/4/39_2012.eng.pdf
References

   Andieva T.A. Tektonicheskaya pozitsiya i osnovnye struktury morya Laptevykh [Tectonic position and major structures of the Laptev Sea]. Neftegazovaya Geologiya. Teoriya I Praktika, 2008, vol. 3, no. 1, available at: http://www.ngtp.ru/rub/4/8_2008.pdf
   Avetisov G.P. Gipotsentriya i fokal'nye mekhanizmy zemletryaseniy del'ty r. Leny i ee obramleniya [Hypocenter and focal mechanisms of earthquakes of Lena River delta and its frame]. Vulkanologiya i seysmologiya, 1991, no. 6, pp. 59-69.
   Daragan-Sushchova L.A., Petrov O.V., Daragan-Sushchov Yu.I., Rukavishnikova D.D. Novyy vzglyad na geologicheskoe stroenie osadochnogo chekhla morya Laptevykh [A new insight into the geological structure of the sedimentary cover of the Laptev Sea]. Regional'naya geologiya i metallogeniya, 2010, no. 41, pp. 5-17.
   Drachev S.S. O tektonike fundamenta shel'fa morya Laptevykh [On the tectonics of the foundation of the Laptev Sea shelf]. Geotektonika, 2002, no. 6, pp. 60-76.
   Drachev S.S. Tektonika riftovoy sistemy dna morya Laptevykh [Tectonics of rift system of the Laptev Sea bottom]. Geotektonika, 2000, no. 6, pp. 43-58.
   Geologiya i poleznye iskopaemye Rossii [Geology and Mineral Resources of Russia]. Vol. 5, book 1. Arkticheskie moray [Arctic Seas]. Saint Petersburg: VSEGEI, 2004, 468 p.
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   Hinz K., Delisle G., Cramer B., Franke D., Fieguth U., Linderman F., Neben S., Toctman H. & Zeibig M. Cruise report: marine seismic measurements and geoscientific studies on the slope and shelf of the Laptev Sea & East Siberian Sea / Arctic with M.V. “Akademik Lazarev”, I.V. “Kapitan Dranitsin”, Preliminary scientific results. BDR-Report, №116.693, 1997.
   Imaeva L.P., Imaev V.S., Koz'min B.M. Noveyshie struktury i sovremennaya geodinamika Arkticheskogo sektora Verkhoyanskoy skladchatoy sistemy [The latest structures and recent geodynamics of the Arctic sector of the Verkhoyansk fold system]. Geologiya polyarnykh oblastey zemli. Moscow, 2009, vol. 1, pp. 233-236.
   Ivanova N.M., Sekretov S.B., Shkarubo S.I. Dannye o geologicheskom stroenii shel'fa morya Laptevykh po materialam seysmicheskikh issledovaniy [Data on the geological structure of the Laptev Sea shelf based on seismic studies]. Okeanologiya, 1989, vol. XXIX, issue 5, pp. 789-793.
   Koz'min B.M. Seysmicheskie polya Yakutii i mekhanizmy ochagov zemletryaseniy [Seismic field in Yakutia, and earthquake focal mechanisms]. Moscow: Nauka, 1984, 126 p.
   Krasnyy L.I. Novye strukturnye elementy v tektonike territorii Rossii i dna obramlyayushchikh morey [New structural elements in the tectonics of the territory of Russia and the bottom of the framing seas]. Regional'naya geologiya i metallogeniya, 2009, no. 39, pp. 5-13.
   Ob"yasnitel'naya zapiska k Tektonicheskoy karte morey Karskogo i Laptevykh i severa Sibiri. Masshtab 1:2 500 000 [Explanatory Note to Tectonic Map of the Kara and Laptev Seas and Northern Siberia. Scale 1:2 500 000]. Bogdanov N.A., Khain V.E., Rozen O.M., Shipilov E.V., Vernikovskiy V.A., Drachev S.S., Kostyuchenko S.L., Kuzmichev A.B., Sekretov S.B. Moscow: Institut litosfery okrainnykh i vnutrennikh morey RAN, 1998, pp. 87-94.
   Poselov V.A., Butsenko V.V., Pavlenkin A.D. Al'ternativa spredingovoy prirode Evraziyskogo basseyna po seysmicheskim dannym (na primere geotransekta khrebet Gakkelya – khrebet Lomonosova) [An alternative to spreading nature of the Eurasian Basin based on seismic data (by example of the Gakkel Ridge - Lomonosov Ridge)]. Geologo-geofizicheskie kharakteristiki litosfery Arkticheskogo regiona. Saint Petersburg: VNIIOkeangeologiya, 1998, vol. 2, pp. 177-183.
   Shipilov E.V. K tektono-geodinamicheskoy evolyutsii kontinental'nykh okrain Arktiki v epokhi molodogo okeanoobrazovaniya [On the tectonic-geodynamic evolution of continental margins of the Arctic in the period of young ocean formation]. Geotektonika, 2004, no. 5, pp. 26-52.
   Shkarubo S.I., Zavarzina G.A. Stratigrafiya i kharakteristika seysmicheskikh kompleksov osadochnogo chekhla zapadnoy chasti shel'fa morya Laptevykh [Stratigraphy and characteristics of the sedimentary cover sequences of the western Laptev Sea shelf]. Neftegazovaya geologiya. Teoriya i praktika, 2011, vol. 6, no. 2, available at: http://www.ngtp.ru/rub/2/14_2011.pdf



Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 14_2011 submitted on 03/24/2011 displayed on website on 04/12/2011
21 p.
pdf  Stratigraphy and characteristics of the sedimentary cover sequences of the western Laptev Sea shelf
To date there is no common point of view on the tracing of the reflectors and their stratigraphic tie within the section of the western Laptev Sea shelf. Numerous reflectors have been identified there by different researchers since CDP reflection technique was applied. These reflectors have various indices and date back to the period from Riphean to Cenozoic. New ways of the sedimentary cover stratification have appeared due to new data obtained by MAGE since 2005 (11000 km of CDP reflection lines). The author's scheme of the sedimentary framework of the western Laptev Sea shelf presented in the article is an additional argument for one of the concepts of the Laptev Sea framework.
Key words: seismic sequence, reflector, sedimentary cover, folded basement, the Laptev basin, the Eurasian basin, the West-Laptev rift system.
article citation Shkarubo S.I., Zavarzina G.A. Stratigrafiya i kharakteristika seysmicheskikh kompleksov osadochnogo chekhla zapadnoy chasti shel'fa morya Laptevykh [Stratigraphy and characteristics of the sedimentary cover sequences of the western Laptev Sea shelf]. Neftegazovaya Geologiya. Teoriya I Praktika, 2011, vol. 6, no. 2, available at: http://www.ngtp.ru/rub/2/14_2011.pdf